Clinton alyord



G. ALVORD.

(No Model.)

LOOM.

v I l 7 ivrrnn STATES PATENT @nrrcn.

CLINTON ALVORD, OF IVORCESTER, MASSACHUSETTS.

LOOM.

SPECIFICATION forming part of Letters Patent No. 447,652, dated March 3, 1891.

Application filed April 19, 1890. Serial No. 348,728. (No model.)

To all whom it may concern:

Be it known that I, CLINTON ALvonn, a citizen of the United States, residing at Worcester, in the county of lVorcester and State of Massachusetts, have invented certain new and useful Improvements in Looms; and I do hereby declare that the following is a full, clear, and exact description thereof, which, in connection with the drawings, making a part of this specification, will enable others skilled in the art to which my invention belongs to make and use the same.

My invention relates to looms, and more particularly to the harness and box motions of open-shed looms.

My invention relates to the harness and box motions of open-shed looms, and more particularly to the cams employed in such motions. In certain forms of harness and box motions in use in open-shed looms levers forming part of the harness and box operating connections are actuated by means of switch-cams, whose switches are controlled by a pattern-chain. In the cam ordinarily known as a switch-cam the movements of the switches simply will change the shape of the cam-i. 6., from a one-up and three-down cam to a two-up and two-down cam, or some such combination. In other words, the cam is still a cam and will cause the roll or pin traveling in its groove and carried by one of the levers aforesaid to move in and out during each revo lution. In a cam embodying my invention, on the contrary, so long as the switches remain in a given position the roll will remain either in or out according to the position of the switches, and if in will move out, or if out will move in, only after the switches have been changed in position, all as will hereinafter be made definitely to appear.

My invention consists, primarily, in a switch-cam of novel constructiondesigned to secure the mode of operation above set forth. It consists, further in the combination of the cam of the particular construction hereinafter set forth with various associated parts of a loom; and it consists, finally, in an improved shuttle-box motion for a loom, all

as will be described hereinafter, and then be pointed out in the claims at the close of the specification.

Referring to the drawings, Figure 1 is a sec- W W of the series of shuttle-boX-operating 6o cams shown in Fig. 2.

In the accompanying drawings, 1 represents a switch-cam of my peculiar construction fast on the shaft 2.

3 is the harness-jack hung loosely on the pin t and carrying the cord 5, which runs over a system of pulleys to the harm ess-frame. (Not shown.) ,7

6 is the chain-shaft, carrying rolls 7 and tubes 8, which operate the indicating-leve 9, 7o hung loosely on the pin 10.

The harness-jack 3has an arm 11, carrying a pin 12, which travels in the groove of the cam 1. Said cam is provided with the frog 13, carrying the contact-piece 14:, hung loosely on the pin 15. Frog 16 is loosely pivoted at 17, and frog 18 is loosely pivoted at 19. The three frogs 13, 10, and 18 are joined together by the two connectors 20 and 21.

The operation of my harness-motion is as follows: My switch-cam is composed of two concentric grooves and two cam grooves which cross each other and open into the concentric grooves, all as shown. The spring 22 bears against the arm .3 of frog 18, and in yielding pressure retains the frogs 13, 16, and" 18 in the position shown in thefulllines, Fig. 1. The pin 12 of the harness-jack 3 is shown in the inner concentric groove, and it is evident that so long as the frogs remain in the position shown in the drawings the rotation of cam 1 will not change the position of the harness-jack. The cam 1 revolves once in every pick of the loom, and the pattern-chain 6 is timed to move the indicating-lever O just 9 5 as the contact-piece 1% moves within reach of the end 24; of' lever 0. \Vhen the contactpiece 11 approaches the in dicating-lever 9, the pattern-chain moves, and if the chain be so built a roll or riser will come under lever .9, and by the motion of said lever 9 thecontactpiece 14 will be depressed, moving frogs 13, 16, and 18 into the dotted-line positions shown in Fig. 1, and the continuedrotation of the Fig. 3 is a view 55 cam 1 will cause the pin 12 to run from (L up the groove (6 b c and into the outer concentric groove of the can).

It is evident that so long as there are risers on the pattern-chain under the indicating-lever 9 the pin 11'.- will travel in the outer c011- centric groove and the harness will remain up; but as soon as a sinker appears again on the pattern-chain and allows the indicating-lever 9 to fall back into the position shown in the drawings the pin 12 will run down the groove (7 hf to the inner groove,and will stay there until called up again. Thus it is noted that the up or down of the harness-jack and corresponding harness at any pick is absolutely controlled by the pattern-chain.

I will now proceed to describe my box-motion. The cams 25, one of which is partly shown in Fig. 2, are of exactlythe same style as the cam 1. The pattern-chain G and indicating-levers 9' 9 work in the manner described above, and upon the build of the pattern-chain (5 depends the position of the levers which work the shuttle-boxes. The lever 26, loosely hung on pin at, is provided with the pin 27, which travels in the groove of the first cam, and from the pin 28 runs the connector 29 to the lever 30, pivoted at 31. The lever 32 is also hung on the pin 4:, and its pin travels in the groove of the cam immediately in the rear of cam 25. From the pin 3iruns the connector 35 to the lever 36, pivoted at 37 and carrying the sheave 38 on the pin 39; The connector is hidden by the connector 20. The cord 40 runs from lever 30 over sheaves 38 and 4:0 to the shuttle-boxes. (Not shown.) The levers 30 and 36 work like ordinary compound dropbox levers. The movement of lever 30 will move one box and the movement of lever 30 will move two boxes. In the drawings lever 30 is down and lever 36 is up. Therefore the third shuttle-box is in position.

In Fig. 5 I have shown a partial detail seetional view of the series of shuttle boxoperating cams, and have also shown an outer disk or shield 42, intended to keep the dirt away from the exposed face of the outer cam.

In Fig. 3 I have shown my cam with only two frogs, and when using only two frogs it is necessary to use an oblong shoe on the pin of the lever operated by the cam, (see Fi 4,) to insure that the pin will not run from one of the cam-grooves into the other cam-groove at the point I).

I will again call attention to the peculiar feature of my camv in having two concentric grooves and two cam-grooves which cross each other and open into the concentric grooves, and that by reason of this peculiar construction the harness-jack or box-lever will remain up or down for any number of revolutions of the cam, this being entirely'controlled by the build of the pattern-chain.

It must be understood that I do not confine myself to the exact construction shown in the drawings. Neither do I confine myself to any particular number of frogs interposed at the junction of the grooves of the cam.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

l. A cam having two concentric grooves and two cam-grooves which cross each other and open into the concentric grooves, and provided with a set of frogs for the purpose of shutting off either of said cam-grooves from said concentric grooves, substantially as described.

2. In a loom, the combination, with a pattern-chain, an indicatingdever, and a set of frogs carrying a contact-piece to work with the indicating-lever, of a cam having two concentric grooves, and two cam grooves which cross each other and open into the concentric grooves, substantially as described.

In a loom, the combination, with a barness-jack provided with a pin to work in a cam, of a pattern-chain, an indicating-lever, and a cam provided with a set of frogs carrying a contact-piece to work with the indicating-lever, said cam having two concentric grooves and two cam-grooves which cross each other and open into the concentric grooves, substantially as described.

4. In a loom, the combination, with a series of levers provided with pins for working in a series of cams, a series of box-operating levers, and intermediate connections between said cam-actuated levers and said box-operating levers, of a pattern-chain, a series of indicating-levers, and a series of cams, each cam provided with a set of frogs carrying a contact-piece to work with the indicating lever, said cams having two concentric grooves and two cam-grooves which cross each other and open into the concentric grooves, substantially as described.

CLIN' 7ON ALVORI).

\Vitnesses:

GEORGE T. DEWEY, EDMUND F. SEYMOUR. 

